Velocity estimation method for moving target of frequency-modulated stepping radar

Aiming at the influence of the target movement acquired by the frequency-modulated stepping radar on composite range profiles, a fast velocity estimation method is proposed. According to the moving target's echo characteristics acquired by the frequency-modulated stepping radar, the envelope migration is firstly carried out for the subset of the compressed pulse. By the correlation processing of signals with the same frequency located in both front and back frames, the range terms and the cross terms of both range and velocity are eliminated, but only the velocity terms are remained. Then a fast estimation of the velocity is come out by a FFT transform. Finally, the echo is compensated in terms of the estimated velocity value, and then a clear one-dimensional range profile is achieved. Simulation results prove the feasibility of the proposed method.